The Anacoco plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
20° on Nov. 13, 2019, the coldest reading for this week of the year since 1903. Next is 21° in 1950.
Anacoco’s center stands about 360 ft above sea level. Within three miles the land runs from 240 ft to 420 ft, a difference of 180 ft: gently rolling country.
Under the town center the state geologic map shows Carnahan Bayou Member (siltstone, sandstone, clay), from the Miocene, 5.3 to 23 million years old.
The section below crosses 6 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 7 mi of the line.
Clay. Age: Holocene, less than 12,000 years old. About 5 mi of the line.
Siltstone, sandstone, clay. Age: Miocene, 5.3 to 23 million years old. About 5 mi of the line.
Clay. Age: Miocene, 5.3 to 23 million years old. About 4 mi of the line.
Clay, siltstone. Age: Miocene, 5.3 to 23 million years old. About 2 mi of the line.
Clay, silt, sand. Age: Pleistocene, less than 2.6 million years old. About 0.2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Anacoco reaches the Gulf of America by way of Franklin Branch, the Bayou Anacoco and the Sabine: about 180 river miles.
Lakes on the way: Sabine Lake and Vernon Lake.
110 miles of the trip are on the Sabine.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Anacoco; river miles along the main stem, rounded.
Anacoco has a humid subtropical climate. Summer afternoons average 93° in July; winter nights fall to about 37° in January. About 59 inches of rain fall in a normal year.
On November 14 Anacoco normally reaches 69° and falls to 45°. The record high is 89°, in 1921; the record low 26°, in 2013. The most rain on this date, 3.55 in, fell in 1998.
Normals 1991–2020 and records since 1903 at Leesville, 10 miles southeast, 330 ft lower. NOAA, through RCC-ACIS.